HV8452 ***********************************************************************
HV8452  DESIGNATION -  HDY 1
HV8452  PID         -  HV8452
HV8452  STATE/COUNTY-  VA/FAIRFAX
HV8452  USGS QUAD   -  MANASSAS (1994)
HV8452
HV8452                         *CURRENT SURVEY CONTROL
HV8452  ___________________________________________________________________
HV8452* NAD 83(1993)-  38 46 45.29212(N)    077 23 41.95471(W)     ADJUSTED
HV8452* NAVD 88     -        70.8    (meters)     232.     (feet)  VERTCON
HV8452  ___________________________________________________________________
HV8452  LAPLACE CORR-           0.00  (seconds)                    DEFLEC99
HV8452  GEOID HEIGHT-         -31.89  (meters)                     GEOID99
HV8452
HV8452  HORZ ORDER  -  SECOND
HV8452
HV8452.The horizontal coordinates were established by classical geodetic methods
HV8452.and adjusted by the National Geodetic Survey in November 1994.
HV8452
HV8452.The NAVD 88 height was computed by applying the VERTCON shift value to
HV8452.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
HV8452
HV8452.The Laplace correction was computed from DEFLEC99 derived deflections.
HV8452
HV8452.The geoid height was determined by GEOID99.
HV8452
HV8452;                    North         East     Units   Scale      Converg.
HV8452;SPC VA N     - 2,124,073.605 3,596,013.103   MT  0.99995236 +0 41 22.8
HV8452;UTM  18      - 4,295,004.150   291,957.779   MT  1.00013300 -1 30 02.1
HV8452
HV8452                          SUPERSEDED SURVEY CONTROL
HV8452
HV8452  NAD 83(1993)-  38 46 45.29094(N)    077 23 41.96116(W) AD(       ) 2
HV8452  NAD 83(1986)-  38 46 45.29142(N)    077 23 41.96764(W) AD(       ) 2
HV8452  NGVD 29     -        71.0    (m)          233.     (f) VERT ANG
HV8452
HV8452.Superseded values are not recommended for survey control.
HV8452.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
HV8452.See file dsdata.txt to determine how the superseded data were derived.
HV8452
HV8452_MAGNETIC: I = MARKER IS A STEEL ROD
HV8452_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
HV8452
HV8452  HISTORY     - Date     Condition        Recov. By
HV8452  HISTORY     - 1975     MONUMENTED       VA-059
HV8452
HV8452                          STATION DESCRIPTION
HV8452
HV8452''DESCRIBED BY FAIRFAX COUNTY VIRGINIA 1975 (WTL)
HV8452''THE STATION IS LOCATED ABOUT 4.45 SOUTHEAST OF CENTREVILLE, 3.6 MILES
HV8452''SOUTHWEST OF BUTTS CORNER AND 0.45 MILES WEST OF CLIFTON OUT ON THE
HV8452''POWER LINE ON TOP OF A HILL OVER LOOKING THE RAILROAD. SEE FAIRFAX
HV8452''COUNTY TAX MAP 75-4.
HV8452''
HV8452''TO REACH THE STATION FROM INTERSECTION OF MAIN STREET AND THE
HV8452''RAILROAD TRACKS IN CLIFTON, PROCEED NORTHERLY 0.05 MILES TO CLIFTON
HV8452''CREEK DRIVE, LEFT. THENCE LEFT ON CLIFTON CREEK DRIVE FOR 0.45 MILES
HV8452''TO OVERHEAD POWER LINES. CLIFTON CREEK DRIVE VEERS RIGHT HALF WAY
HV8452''THROUGH THE 0.45 MILES, KEEP TO THE LEFT ON A DIRT ROAD THAT
HV8452''PARALLELS THE RAILROAD TRACKS. HDY-1 IS ON TOP OF THE HILL ON THE
HV8452''RIGHT AND SETS IN BETWEEN THE RAILROAD AND TOWE NUMBER 566/66.
HV8452''
HV8452''THE STATION IS A REINFORCEING ROD WITH PLASTIC CAP STAMPED---FAIRFAX
HV8452''CO DPW SUR--- IN THE GROUND ABOUT 3 INCHES BELOW THE GROUNDS SURFACE
HV8452''LOCATED 13. FEET W FROM CENTER LINE OF DIRT AND ROCK ROAD AND 39.
HV8452''FEET SE FROM POWER LINE TOWER NUMBER 566/66.
HV8452''
HV8452''REFERENCE MARK NO. 01 IS A FILED X ON TOP OF A BOLT IN THE CONCRETE
HV8452''FOOTER WHICH IS MOST WESTERLY FROM THE DIRT ROAD AND NEAREST THE
HV8452''WOODS LINE. TOWER NUMBER 566/66.
HV8452''
HV8452''REFERENCE MARK NO. 02 IS A FILED X ON TOP OF A BOLT IN THE CONCRETE
HV8452''FOOTER WHICH IS MOST EASTERLY FROM THE WESTERN WOODS LINE AND IS
HV8452''CLOSEST TO THE DIRT ROAD. TOWER NUMBER 566/66.